self-join

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How to use GROUP BY with SELF JOIN?

I have a person table which holds person and his manager at the same time.I\'m using SELF JOIN to select managers email but I get a lot of duplicates.[详细]

2023-04-11 10:37 分类：问答
self join in a table

CustIDNameReferredBy 1Neeta Sayam 2Dolly Dilly1 3Meena Kimi2 Find the names of all customers who are referred by others.[详细]

2023-04-08 15:07 分类：问答
How to use Group By and self-join to return min, max, open, and close daily price restult set?

SOLVED All hail StackOverlow! While I was gone, people left 2 solutions (thanks guys--what is the protocol for handing out karma for two working solutions?)[详细]

2023-04-05 19:53 分类：问答
MySQL/PHP Eliminating duplicate, non-identical, returns from a MySQL self-join

I have a small database, holding the details of just under 400 ponies. I wish to query that table and return a table showing the pertinant details of each pony, and it\'s owner\'s and breeder\'s names[详细]

2023-03-29 14:03 分类：问答
Slow self-join delete query

Does it get any simpler than this query? delete a.* from matches a inner join matches b ON (a.uid = b.matcheduid)[详细]

2023-03-29 03:01 分类：问答
Use MySQL to SELECT attributes similar to Amazon's SimpleDB

Sorry I couldn\'t think of a better way to title this. In Amazon\'s SimpleDB, an item can have multiple values in the same column, so it\'s possible to select only those items that have all of the att[详细]

2023-03-25 15:25 分类：问答
How to Output the results of a MySQL query that used aliases?

I have two primary MySQL tables (profiles and contacts) with many supplementary tables (prefixed by prm_). They are accessed and manipulated via PHP.[详细]

2023-03-24 22:11 分类：问答
mysql compare columns in same table

I have a table in a mysql db as idfruitnumber_eatenday ---------------------------------- 1apple21 2banana11[详细]

2023-03-22 00:55 分类：问答
Sql questions about self join

I have question regarding SQL join for MySQL. Let suppose I have following table A and parent-child relation ship.How can I get all children (including sub children of children till leaf node)given p[详细]

2023-03-14 10:28 分类：问答
sql server - Combine single ids into range

I have a table that contains lots of integers. This table gets queried and the results end up being turned into xml. If the table contains for example the following items:[详细]

2023-03-13 23:22 分类：问答